~extremepopcorn/dhlib/dhlib_ep

<?php

	include 'std.inc.php';

	include 'radio_data.php';

	setup_xml_response();

	//don't have many songs now, so allow them to play more often

	$remember_song_count = 10;

	//use a token to prevent the songs playing multiple times and

	//to alternate between commerical and theme songs

	//FORMAT: token, token, ...

	$tokenstr = get_request_def( 'token', '' );

	//limit length, for input cleaning

	$tokenstr = substr( $tokenstr, 0, 1000 );

	$tokens = explode( ',',  $tokenstr );

	//remove those already played

	$remain_comm = array_diff( $comm, $tokens );

	$remain_demo = array_diff( $demo, $tokens );

	//restore empty lists

	if( count( $remain_comm ) == 0 )	

		$remain_comm = $comm;

	if( count( $remain_demo ) == 0 )

		$remain_demo = $demo;

	//decide what kind to play next (alternative between comm/demo)

	if( count( $tokens ) > 0 ) 

	{

		$last = array_pop( array_slice( $tokens, -1, 1 ) );

		if( array_search( $last, $comm ) !== FALSE )

			$selectfrom = $remain_demo;

		else

			$selectfrom = $remain_comm;

	}

	else

		$selectfrom = $remain_comm;

	//choose a track at random

	$select = $selectfrom[ array_rand( $selectfrom ) ];

	$song = $songs[$select];

	//append to token so client must not keep track

	$tokens[] = $select;

	if( count( $tokens ) > $remember_song_count )	//remember only X songs?

		$tokens = array_slice( $tokens, -$remember_song_count );

	$tokenstr = implode( ',', $tokens );

	print <<<EOT

<track id="$select" token="$tokenstr">

	<sound>${song['sound']}</sound>

	<image>${song['image']}</image>

	<about>${song['about']}</about>

	<title>${song['title']}</title>

	<album>${song['album']}</album>

	<artist>${song['artist']}</artist>

EOT;

	foreach( $song['purchase'] as $p ) {

		print( "<purchase name='" . htmlspecialchars( $p['name'], ENT_QUOTES )

			. "' location='" . htmlspecialchars( $p['location'], ENT_QUOTES )

			. "'>" . $p['link'] . "</purchase>\n" );

	}

	print( '</track>' );

?>